Makita Maktec MT622 Manual

* With Top grip
Model No.
Description
CONCEPT AND MAIN APPLICATIONS
Specification
Dimensions: mm (")
Width (W)
Height (H)
Length (L) 267 (10-1/2)
86 (3-3/8)
396 (15-5/8)
MT622
13mm Drill
MT622 has been developed as a cost-effective maktec 13mm Drill for emerging countries.
Its features are as follows:
• Without Variable speed control switch
• With Rotation reversing facility
Standard equipment
Note: The standard equipment may vary by country.
Top grip .........................................................1
Chuck key .....................................................1
Key holder .....................................................1
Optional accessories
D-handle
PRODUCT
P 1/ 8
Weight according to
EPTA-Procedure 01/2003*: kg (lbs) 2.7 (6.0)
Double insulationProtection against electric shock
Yes
Soft grip
NoVariable speed control by trigger
2.0 (6.6)Power supply cord: m (ft)
No load speed: minˉ¹= rpm 600
Rotation reversing facility Yes (Rocker switch)
MT622
Specification Model
240 3.3 50/60 750 550
Continuous Rating (W)
Voltage (V) Cycle (Hz) Input Output
350
Max. Output (W)
110
120
220
230
7.2
6.6
3.6
3.5
50/60
50/60
50/60
50/60
750
750
750
550
550
550
550
Current (A)
350---
350
350
350
Drill chuck type Keyed
Chuck capacity: mm (") 1.5 - 13 (1/16 - 1/2)
Capacities: mm (") 13 (1/2)
Wood
Steel
36 (1-7/16)
W
H
L
TECHNICAL INFORMATION
OFFICIAL USE
for ASC & Sales Shop

P 2/ 8
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Armature
[1] NECESSARY REPAIRING TOOLS
CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”.
Code No. Description Use for
1R139 Drill chuck extractor locking Spindle when removing Drill chuck S-13
1R223 Torque wrench shaft 20-90N∙m
removing Drill chuck S-13
removing damaged Drill chuck S-13
removing Ball bearings 608ZZ and 6202DDW
removing/ assembling Retaining ring S-14
removing/ assembling Bearing retainer 23-36
1R224 Ratchet head 12.7 (for 1R223)
1R269
1R291 Retaining ring S and R pliers
1R298 Hex. bar 10 with Square socket
1R340 Bearing retainer wrench
781024-2 Wrench 43
Bearing extractor
[2] LUBRICATION
DISASSEMBLING
Apply Makita grease FA No.2 to the following portions designated with the black triangle to protect parts and product
from unusual abrasion.
Fig. 1
Item No. Description Amount
5g approx.
5g approx.
Portion to lubricate
Gear housing complete
1. Remove Carbon brushes.
2. Remove four 5x40 Tapping screws.
Carbon brushes
5x40 Tapping
screws (4 pcs.)
3. Separate Gear housing section
from the machine.
4. Pull off Armature from
Motor housing complete.
5. Remove Ball bearings 608ZZ from the both side of
Armature assembly using with 1R269.
And then, remove Insulation washer.
13
13
9
9Gear complete 7-41 Teeth portions for smooth engaging
Teeth portions for smooth engagingSpur gear 47
Ball bearing 608ZZ
Insulation washer
Disassemble Armature as drawn in Fig. 2.
Fig. 2

P 3/ 8
Repair
DISASSEMBLING
[3] DISASSEMBLY/ASSEMBLY
[3]-2. Drill chuck
Hex
wrench
ASSEMBLING
Assemble Drill chuck as shown in Fig. 4.
Note: Set the fastening torque of 1R223 to 70N·m ~ 80N·m (714kgf·cm ~ 816kgf·cm) and turn 1R223 clockwise.
Wrench 43
(781024-2)
1. Hold 1R139 firmly with vise, then set the machine
to 1R139 by fitting the flat portion of Spindle
to the groove of 1R139.
2. Set Wrench 43 (781024-2) to Drill chuck so that
the pin of Wrench 43 is inserted into the hole of
Drill chuck.
3. Turn Wrench 43 (781024-2) counterclockwise
to remove the damaged Drill chuck.
Damaged Drill chuck
Drill chuck S-13
(1) Remove Drill chuck S-13 from the machine as drawn in Fig. 3
or Fig. 3A.
(2) In case of the damaged Drill chuck, use Wrench 43 (781024-2) to remove the damaged one as drawn in Fig. 3A.
1R139
1. Secure a hex wrench in Drill chuck firmly.
2. Hold 1R139 firmly in vise, then set the machine
to 1R139 by fitting the flat portion of Spindle
to the groove of 1R139.
3. Attach a pipe to a hex wrench, and then turn the pipe
counterclockwise to remove Drill chuck.
Note: Be careful not to remove the hex wrench from
the pipe and Drill chuck.
Fig. 3A
Fig. 3
Fig. 4
Pipe
1R298
Drill chuck S-13
1R224
1R223
1R139
1. Secure 1R298 in Drill chuck firmly.
2. Hold 1R139 firmly in vise, then set the machine
to 1R139 by fitting the flat portion of Spindle
to the groove of 1R139.
3. Attach 1R224 to 1R223, and then set them to 1R298.
4. Turn 1R223 clockwise to assemble Drill chuck to
Spindle.

Repair
DISASSEMBLING
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Spindle and Gear section (cont.)
Fig. 6
1. Remove Pin 3. And then, remove Flat washer 6 and Gasket.
Note: Be careful not to lose Pin 3.
2. Remove Retaining ring S-14
with 1R291.
Spindle
Key 5
Ball bearing
6202DDW
Ball bearing 626ZZ
Ball bearing 626ZZ
Ball bearing
6202DDW
Flat washer 6
3. Remove Spindle and Ball bearing 6202DDW from
Gear housing section. Then, remove Gear complete 7-41
and Spur gear 47 from Gear housing as drawn below.
P 4/ 8
Retaining ring S-14
Gear complete 7-41
4. Use Gear complete 7-41 as a jig to remove
Ball bearing 626ZZ from Gear housing.
Insert the shaft end of Gear complete 7-41 into
Ball bearing 626ZZ temporarily.
Spur gear 47
5. While tilting shaft of Gear complete 7-41,
tap the edge ofGear housing complete with
a plastic hammer to remove Ball bearing 626ZZ
from Gear housing complete.
6. Remove Ball bearing
6202DDW from
Spindle with 1R269.
Ring 15
Gear complete 7-41
Pin3
Gasket
Ball bearing 626ZZ
Spindle
1R269
(1) Remove Drill chuck from the machine as drawn in Fig. 3/ 3A.
(2) Remove Gear housing as drawn in Fig. 5.
(3) Disassemble Gears from Gear housing complete as drawn in Fig. 6.
Fig. 5
1. Hold Switch handle in vise carefully.
Note: Use a rag to protect Switch handle in vise.
Remove Bearing retainer 22-36 by turning it clockwise with 1R340.
2. Separate Gear housing complete from
the machine by removing four 5x40
Tapping screws.
Bearing retainer 23-36 Gear housing
5x40 Tapping screw
(4 pcs.)
Rag
1R340
Switch cover handle

Repair
ASSEMBLING
(1) Assemble Gear section by reversing the disassembly procedure. (Fig. 7)
(2) Assemble Gear housing and Gear cover to Motor housing section by reversing the disassembly procedure.
Refer to Fig. 2 of page 2.
Note: 1. Use a rag to protect Switch handle in use of vise.
2. Turn 1R340 counterclockwise for setting Bearing retainer 23-36 in place.
P 5/ 8
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Spindle and Gear section (cont.)
Fig. 7
1. Assemble Ball bearing 626ZZ
to Gear housing complete.
2. Pressfit Ball bearing 6202DDW
to Spindle.
3. Insert Ring 15 to Spindle.
Then, mount Key 5 to
the groove of Spindle.
Spindle
Key 5
4. Assemble Spindle section to Gear housing complete.
Then, assemble Spur gear 47 to Spindle while fitting
its cut portion to Key 5. And then, secure the spur gear
with Retaining ring S-14.
5. Insert Gear complete 7-41 into Ball bearing
626LLB with Spur gear 47 engaged.
Note: Do not forget to assemble Flat washer 6.
6. Assemble Pin 3 and Gasket to Gear housing complete.
Retaining ring S-14
Ring 15
Ball bearing
6202DDW
Spindle
Ball bearing
626ZZ
Rubber pin 4
cut portion
Spur gear 47 Gear complete 7-41
Flat washer 6
Gasket
Pin 3

Circuit diagram
P 6/ 8
White
Color index of lead wires' sheath
Black
Blue
Brown
Field
Orange
Purple Switch
Power supply cord
Circuit without Radio interference suppression
Fig. D-1
Circuit with Radio
interference suppression
Non-insulated sleeveNon-insulated sleeve
[View from Commutator side]
Closed end splice
is used for some
countries.
Terminal block
#18 AWG
Non-insulated connector
Black lead wire
is used for some
countries.
White lead wire
is used for some
countries.
Strain relief
#18 AWG
Circuit of Switch
32
Forward mode:
conduct 2 - 6, 3 - 5
Reverse mode:
conduct 2 - 3, 5 - 6
5
6
Field
Switch
Resistance
Non-insulated
sleeve
Line filter (If it is used.)
• Two holes type Line filter
is used for low voltage areas.
• One hole type Line filter
is used for high voltage areas.
Closed end
splice
Closed end splice
is used for some
countries.
Terminal block
Closed end
splice
Power supply cord
Two holes typeOne hole type
[View from Commutator side]
#20 AWG
#18 AWG
#18 AWG
Noise
suppressor
(If it is used.)
Non-insulated connector
#18 AWG
Black lead wire
is used for some
countries.
White lead wire
is used for some
countries.
Strain relief
#18 AWG

Wiring diagram
Fig. D-2
Field lead wires have to be guided as follows.
1. Guide out Field lead wires while tightening
these wires in Motor housing so that these wires
can be easily connected to Switch without touching
to the edge of Opening.
2. Fix these lead wires in Lead wire holders.
Field
Wire connected
portion
Lead wire
holder
edge of Opening
Lead wire
holder
Assemble Field to Motor housing
while facing the wire connected
portion to Cap side.
Setting and Wiring of Field Lead wire
P 7/ 8
Cap

P 8/ 8
Setting and Wiring of Noise suppressor
and Resistance
Facing the wire connected side to Switch handle set L,
set Noise suppressor and Resistance to the handle.
Switch handle set L
Noise
suppressor
Noise
suppressor
(If it is used.)
Terminal block
(If it is used.)
Resistance
Resistance
Closed end splice
Put Closed end splice
to the place here.
Be careful not to put
any lead wires under
Terminal block.
Inner wall Rib
Switch
Wiring through Line filter
Pass Field lead wires (orange, purple)
through Line filter as drawn below.
And put it to the place as drawn right.
Line filter
Put Field lead wires between Rib and
the inner wall of Switch handle L.
Wiring in Switch handle L
with Radio interference suppression
Wiring diagram
Fig. D-3
Two holes type
One hole type
[Right] [Wrong]